On Wednesday, the World Health Organization announced that the number of people killed by Ebola has now risen to over five thousand, with more than fourteen thousand ______.
—Excuse me, Madam.Taking photos is forbidden here out of security.—I’m really sorry, I _______ of that.
The civil war broke out in Libya, ______ to the instability of the international oil price.
Recently a new social issue has been brought to everyone’s attention ___ __food additives are abused.
While the police have already done a lot of investigation, much evidence ___ __.
_____ on everyday practice, progress in English is a goal which can be achieved.